Abstract : These estimates pertain to procurement, production, and modernization of support equipment and materials not otherwise provided for, Navy ordnance and ammunition (except ordnance for new aircraft, new ships, and ships authorized for conversion) the purchase of which not to exceed two vehicles required for physical security of personnel notwithstanding price limitations applicable to passenger carrying vehicles but not to exceed $100,000 per vehicle; the purchase of not to exceed (eight hundred and sixty-one) passenger motor vehicles of which (seven hundred and seventeen) shall be for replacement only; expansion of public and private plants, including the land necessary therefor, and such lands and interests therein, may be acquired, and construction prosecuted thereon prior to approval of title; and procurement and installation of equipment, appliances, and machine tools in public and private plants; reserve plant and Government and contractor-owned equipment layaway.